Kaltura_Client_Exception thrown

Invalid KS "ODk1MjJmODZiZTcxNDhkNTRhYTY5MjQyMzJkMDhmZjJkMDY5OGQxYXwxMDE7OzE0NzQ4ODE1MDM7MjsxNDc0Nzk1MTAzLjg2Mjk7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"